Yes, it is on my property. I do not think anything is wrong with the h/w, but do not know. Nagios shows it to be mostly unreachable/indeterminate/down. It has been up 6.5% this year, and none of that since May. Not sure what to do. Thanks for any help.

Hmmm ... is it part of your LAN? If so and you know what its IP address is you can start by pinging it. If it answers then you have to see what kind of logs it has. If it has a web server built into it you may be able to web into its admin server to run diagnostics. Or use telnet to check its logs. Or it may be a pointing error - I don't konw how sensitive these antennas are to misallignment.

The logs may tell you what kind of signal strength it picks up from its neighbors.

No, it is not part of my LAN. SFLAN, in the person of Ralf Muehlen, set it up. I can no longer contact him. I provide only power. I need a response from someone at SFLAN to figure out what is going on, but I fear that SFLAN is no longer...at least that is how it appears.